Power supply system including high-voltage system and low-voltage system
a power supply system and low-voltage technology, applied in secondary cell servicing/maintenance, batteries, instruments, etc., can solve the problems of increasing cost, wasting energy and achieves the effects of wasting energy, simple configuration, and consuming electric power
Active Publication Date: 2019-09-19
YAZAKI CORP
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The present invention is about a power supply system that uses a high-voltage battery and a low-voltage system to equalize the battery's performance. The system is designed to be innovative and energy-efficient. Its technical effect is to provide an improved power supply system that ensures high performance and efficiency.
Problems solved by technology
The passive equalization can be performed with a simple configuration and is popular, however it consumes electric power by discharging, wasting energy.
On the other hand, the active equalization is energy-efficient, however it is not popular since it requires a complicated configuration which causes an increase in cost.
Method used
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Embodiment Construction
[0018]The following will explain an exemplary embodiment of the present invention in reference to the drawings. FIG. 1 is a block diagram showing a configuration of a power supply system 10 according to this embodiment. The power supply system 10 is a power supply system of a vehicle such as a hybrid vehicle and an electric vehicle, and includes a high-voltage system having a high-voltage battery 110 for traveling and a low-voltage system.
[0019]The high-voltage battery 110 may include a lithium-ion battery pack, a nickel-hydride battery pack or the like having a plurality of secondary cells connected in series, and is configured to supply several hundred V voltage to the high-voltage system having a motor for traveling (not shown).
[0020]The high-voltage battery 110 requires equalization of state of charge, e.g. charge capacity, to sufficiently exert its performance. Thus, the high-voltage system is provided with an equalization and transmission processing part 180 that performs the ...
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A power supply system including a low-voltage system and a high-voltage system having the high-voltage battery, that can provide an energy-efficient system of equalization of the high-voltage battery, is provided. The power supply system includes the high-voltage system having the high-voltage battery constituted of a plurality of battery cells, the low-voltage system, an insulation transmission part configured to transmit, in an insulated fashion, energy from each of the battery cells to the low-voltage system individually, and an equalization and transmission processing part configured to measure voltage of each of the battery cells, set a target battery cell to be processed for equalization, and control operation of the insulation transmission part and thereby transmit energy of the target battery cell to the low-voltage system.
Description
FIELD OF THE INVENTION[0001]The present disclosure relates to equalization of a high-voltage battery in a power supply system including a high-voltage system having the high-voltage battery and a low-voltage system.BACKGROUND[0002]In general, in addition to a high-voltage battery for traveling, a vehicle such as a hybrid vehicle and an electric vehicle is mounted with a low-voltage battery to supply power to low-voltage loads such as electronic control devices and electric devices. A 12V lead storage battery is widely used as the low-voltage battery.[0003]The low-voltage loads to which electric power is supplied from the low-voltage battery are associated with functions such as traveling, steering, stopping, opening and closing of a door. These low-voltage loads can be divided into two types, loads for which it is desirable that supply of power is maintained during failure of the low-voltage battery (hereinafter called “backup loads”), and other loads (hereinafter called “regular lo...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H02J7/00H02M3/335G01R31/382H01M10/42
CPCH02J7/0019H02M3/33523H01M2010/4271H01M10/425G01R31/382H01M2220/20H02J7/0021H02J7/0014B60L58/22Y02T10/92
Inventor MATSUNAGA, MOTOTATSUUEZONO, KOICHI
Owner YAZAKI CORP